The Victoria Falls area has the following border posts.

Victoria Falls Bridge between Zimbabwe and Zambia
The Victoria Falls Bridge border post connects Victoria Falls town (Zimbabwe) with Livingstone (Zambia). This is one of the most scenic border crossings in the world, with views of Victoria Falls; it is also very congested at peak times so please be patient.
This border post is open 24 hours 7 days a week.
Only one vehicle can cross the bridge at a time, so a short wait may be needed.

Kazungula between Zimbabwe and Botswana
This crossing takes you from Victoria Falls directly into Botswana, bypassing Zambia.

Kazungula between Botswana and Zambia.
This crossing takes you from Zambia into Botswana, mostly for Chobe National Park Day Trips or onward travel into Botswana.
You will be required to step on a treated mat and disinfect shoes for foot-and-mouth disease control
To clarify: if you were crossing the bridge at Kazangula from Zambia and wanted to get into Zimbabwe you would go out Zambia border post into Botswana post post and then into Zimbabwe border post.

Botswana and Nambia border in Kasane – Impalila Island / Kasika
There is no direct border crossing from Zimbabwe to Namibia. Guests travel via Kasane, Botswana and transfer by boat to Impalila Island immigration
Kasane Immigration hours: 07:30–16:30 daily (latest arrival 16:00).
This border is used for Zambezi Queen, Ichingo Island Lodge and Zambezi Princess boats

Botswana and Namibia border at Ngoma.

Transfers: To make stress free we recommend pre-arranged border transfers with our reliable and experienced preferred service providers who assist you every step of the way.

What to have on hand when crossing a border:
Your passport . It must be valid for at least 6 months past your travel date. It must have 2 to 3 completely empty passport pages.
Exact cash ready for visa payments if required.
Card payments are unreliable at border posts – carry USD (post-2006 series preferred) in small denominations ($1, $5, $10, $20)
Have water, reading material and sun protection (hat and sunscreen) in case of queues. Vic Falls can get really hot for people used to cooler climates so a pro trip is to travel with a small spray bottle with water to cool yourself with a spritz!
Patience – queues and delays can occur, especially during peak season (July to October).